machineine$ host -t ns example.com
example.com name server ns1.example.com
example.com name server ns2.example.com

machine$ host -l example.com ns1.example.com
example.com name server ns1.example.com
example.com name server ns2.example.com
www.example.com has address 172.26.105.20
mailhost.example.com has address 172.26.105.31
mailbackup.example.com has address 172.26.105.20
172-26-105-31.example.com domain name pointer mailhost.example.com
db.example.com has address 172.26.105.21
anonftp.example.com has address 172.26.105.22